Condensate line erosion problems

Hi, Gentlemen,
Here Iam calling your attention to corrosion-erosion problem noticed in Steam condensate lines in our Refinery / Petrochemical units.

             Due  to  the  severe  erosion problems in Medium and High steam
        condensate  lines,  the  elbows  and  reducers  at  d/s  of  CVs are
        punctured.     One  typical  layout  of a Medium pressure condensate
        line CV station is enclosed for reference.

        The erosion points noticed were :



        (i) the elbow at the d/s Globe Valve (by-pass line)




        (ii) the ecc. reducer and elbow at the d/s of CV




        (iii) the Control Valve trims (316 SS)

(Embedded image moved to file: pic26443.pcx)

Query :
1) Kindly let us know your expert opinion on above failures 2) Do you have any suggestion / comments on the piping layout used for CV

        stations
3) Remedial actions reqd to avoid such failures in future

Best Regards
T Haridas

[Non-text portions of this message have been removed] Received on Mon Nov 25 05:00:00 2002